US12010489B2 - UWB-based low-delay lossless digital audio - Google Patents

UWB-based low-delay lossless digital audio Download PDF

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US12010489B2
US12010489B2 US17/882,594 US202217882594A US12010489B2 US 12010489 B2 US12010489 B2 US 12010489B2 US 202217882594 A US202217882594 A US 202217882594A US 12010489 B2 US12010489 B2 US 12010489B2
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digital audio
uwb
module
processing module
transmission unit
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US20230412975A1 (en
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Fengshuo Wang
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present utility model relates to the technical field of wireless communications, and particularly to a UWB-based low-delay lossless digital audio transmission unit and system, and an electronic device.
  • Wireless transmission directly reduces the constraints of wiring and distance. Connections between devices can be added or changed by establishing new connections only through a simple operation, without rewiring. Wireless transmission encompasses many transmission techniques and standards, such as Bluetooth, Wi-Fi, ZigBee, NFC, IrDA, and the like which are common in life.
  • Bluetooth and Wi-Fi are commonly used in wireless audio transmission systems, but these techniques have more or less some defects for specific applications. Bluetooth features short transmission distance and limited bandwidth, and is thus improper for lossless audio data transmission. Such defects may lead to high transmission delay in low-delay lossless audio transmission, limiting the application range of Bluetooth. Wi-Fi is mainly used for file transmission and is capable of transmitting lossless audios. However, low-delay lossless audio transmission applications require a wireless router, which poses problems such as complicated settings, high power consumption, crowded components causing mutual interference, and difficulties in synchronization between audio channels. As such, wireless audio transmission system can only realize one-to-one transmission, that is, realizing audio transmission between one master device and one slave device, rather than one-to-multiple or multiple-to-one audio transmission. As a result, such audio transmission systems can hardly be suitable for various scenarios in real life and work.
  • a current UWB wireless transmission technology can provide a data transmission rate of up to 480 Mbps at a frequency between 3.1 GHz and 10.6 GHz, which provides a good technology basis to solve the above-mentioned problems.
  • the present utility model is intended to provide a UWB-based low-delay lossless digital audio transmission unit and system, and an electronic device, for realizing one-to-one application as well as one-to-multiple or multiple-to-one audio transmission, thereby ensuring the applicability of the audio transmission systems in various scenarios in real life and work.
  • the present utility model adopts the following technical schemes:
  • a UWB-based low-delay lossless digital audio transmission unit comprising an audio input module, an audio processing module, a radio frequency transceiving module and a UWB processing module, wherein
  • an I2S interface module is electrically connected with the audio signal processing module, and is configured to acquire the first digital audio signal or output the second digital audio signal
  • the I2S data processing module is electrically connected with the I2S interface module, and is configured to process the acquired first digital audio signal
  • the FIFO buffer is simultaneously in signal connection with the UWB processing module and the I2S data processing module.
  • the FIFO buffer is communicatively connected with the UWB processing module through a real-time transport protocol stack.
  • the digital audio transmission unit further comprises a clock module; the clock module is configured to provide a master clock signal to the I2S interface module.
  • the digital audio transmission unit further comprises a power supply module configured to supply electric energy to the digital audio transmission unit.
  • a status information interface module is further connected to the UWB processing module, and the status information interface module is configured to connect a microprocessor.
  • the digital audio transmission unit further comprises an audio output module; the audio output module is in signal connection with the audio processing module, and is configured to output the second digital audio signal.
  • the present utility model further provides a UWB-based low-delay lossless digital audio transmission system, comprising a transmitting device and a receiving device, wherein each of the transmitting device and the receiving device has the UWB-based low-delay lossless digital audio transmission unit described above.
  • the present utility model further provides an electronic device, comprising a circuit board having the UWB-based low-delay lossless digital audio transmission unit.
  • the combination of the UWB processing module, the radio frequency transceiving module, the audio processing module and the audio input module takes advantages of the high bandwidth and low power consumption of UWB transmission, and solves the bandwidth and delay problems in Bluetooth transmission and the high power consumption and EMI resistance problems in Wi-Fi transmission.
  • the present utility model can realize the bidirectional audio transmission between a master device and a slave device as well as the one-to-multiple or multiple-to-one audio transmission, thus ensuring the applicability of the audio transmission systems in various scenarios in real life and work.
  • FIG. 1 is a schematic diagram illustrating the principle of the present utility model
  • FIG. 2 is a schematic diagram illustrating the principle of a digital audio transmission system of the present utility model
  • FIG. 3 is a simple schematic diagram illustrating one-to-one wireless audio transmission in the present utility model
  • FIG. 4 is a simple schematic diagram illustrating multiple-to-one wireless audio transmission in the present utility model.
  • FIG. 5 is a simple schematic diagram illustrating one-to-multiple wireless audio transmission in the present utility model.
  • orientations or positional relationships indicated by the terms “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, and the like are orientations or positional relationships as shown in the drawings, and are only for the purpose of facilitating and simplifying the description of the present utility model instead of indicating or implying that devices or elements indicated must have particular orientations, or be constructed and operated in the particular orientations. Such terms shall not be construed as limiting the present utility model.
  • first and second are only for the purpose of description, and may not be construed as indicating or implying the relative importance or implicitly indicating the number of technical features indicated. Thus, features defined by “first” and “second” may explicitly or implicitly include one or more of that feature.
  • plurality refers to two or more, unless otherwise explicitly and specifically defined.
  • the terms such as “mount”, “connect”, “link”, “fix” and the like should be interpreted in a broad sense.
  • it may be a fixed connection, a detachable connection or integration; may be a mechanical connection or an electric connection; or may be a direct connection, an indirect connection by means of an intermediate, an internal interconnection of two elements or an interaction of two elements.
  • mount may be a fixed connection, a detachable connection or integration; may be a mechanical connection or an electric connection; or may be a direct connection, an indirect connection by means of an intermediate, an internal interconnection of two elements or an interaction of two elements.
  • a UWB-based low-delay lossless digital audio transmission unit comprising an audio input module, an audio processing module, a radio frequency transceiving module and a UWB processing module.
  • the audio input module is configured to input an audio signal, to convert the audio signal into a first digital audio signal in I2S format, and to output the first digital audio signal.
  • the audio processing module is in signal connection with the audio input module, and is configured to receive the first digital audio signal in I2S format output by the audio input module, to process the first digital audio signal and then transmit the processed first digital audio signal to the UWB processing module.
  • the UWB processing module is simultaneously in signal connection with the audio processing module and the radio frequency transceiving module, and is configured to process the first digital audio signal received from the audio processing module and a second digital audio signal received from the radio frequency transceiving module; the radio frequency transceiving module is further in signal connection with another digital audio transmission unit, and is configured to send, to the another digital audio transmission unit, the first digital audio signal processed by the UWB processing module, and further configured to receive the second digital audio signal in I2S format sent by the another digital audio transmission unit to the UWB processing module.
  • the radio frequency transceiving module is an antenna array mounted on the UWB processing module
  • the audio processing module is an audio codec
  • the UWB processing module is a UWB chip.
  • the UWB chip includes, but is not limited to, GT1000 chip of Shenzhen Giant Microelectronics.
  • the UWB processing module and the radio frequency transceiving module are connected to form a UWB wireless transmission unit.
  • an I2S interface module is electrically connected with the audio signal processing module, and is configured to acquire the first digital audio signal or output the second digital audio signal.
  • the I2S data processing module is electrically connected with the I2S interface module, and is configured to process the acquired first digital audio signal.
  • the FIFO buffer is simultaneously in signal connection with the UWB processing module and the I2S data processing module, and is configured to receive and buffer the second digital audio signal and send the second digital audio signal to the I2S data processing module for processing.
  • the I2S interface module is a standard I2S bidirectional digital interface, which supports data formats including but not limited to a bidirectional 44.1-192 kHz sampling rate and a bit depth of 16-32 bits, and supports TDM input/output.
  • the I2S data processing module is configured to pack the first digital audio signal input from an input port of the I2S interface module; the first digital audio signal specifically comprising data such as first audio data and first audio information.
  • the I2S data processing module is further configured to unpack the second digital audio signal input by the UWB processing module, where the second digital audio signal specifically, at this time, comprising packed data such as second audio data and second audio information; and the I2S data processing module is also configured to output audio signals corresponding to sampling and channel from an output port of the I2S interface module according to the second audio information in the second digital audio signal.
  • the FIFO buffer is communicatively connected to the UWB processing module through a real-time transport protocol stack.
  • the FIFO buffer can buffer the received first digital audio signal and second digital audio signal.
  • the FIFO buffer ensures low delay and lossless continuity of audio data during error correction retransmission in wireless transmission.
  • the size of the FIFO buffer is dynamically adjusted according to a sampling rate and the number of channels. An excessively great size of the FIFO buffer will affect the delay, while an excessively small size will cause staccato.
  • the digital audio transmission unit further comprises a clock module.
  • the clock module is configured to provide a master clock signal to the I2S interface module.
  • the master clock signal comprises a reference clock source and a VCXO clock source.
  • the clock module is electrically connected with the audio processing module, and is configured to guarantee the accuracy and low jitter of the output clock when an I2S interface outputs audio data, to serve as a clock reference to identify an input sampling rate and a bit depth when the I2S interface inputs audio data, and to serve as a clock reference for inter-channel synchronization when there are multiple channels.
  • the digital audio transmission unit further comprises a power supply module configured to supply electric energy to the digital audio transmission unit.
  • the power supply module is further configured to manage and control the power consumption of the entire digital audio transmission unit, and the power supply module is electrically connected with both the UWB processing module and the I2S data processing module simultaneously.
  • the UWB processing module is further connected with a status information interface module.
  • the status information interface module is configured to connect a microprocessor.
  • the microprocessor is further provided with an interface for connection with the audio processing module.
  • the status information interface module is configured to facilitate the microprocessor to acquire control information and status information such as relative position and angle, audio sampling rate, audio sampling bit depth, number of channels and volume from the UWB processing module.
  • the status information interface module includes, but is not limited to, the following types: I2C interface, UART interface, SPI interface, etc.
  • the microprocessor is a single-chip microcomputer.
  • the digital audio transmission unit further comprises an audio output module.
  • the audio output module is in signal connection with the audio processing module and is configured to output the second digital audio signal.
  • the audio output module is a loudspeaker.
  • the present utility model further provides a UWB-based digital audio transmission system, comprising a transmitting device and a receiving device, wherein each of the transmitting device and the receiving device has the UWB-based low-delay lossless digital audio transmission unit described above.
  • the clock module on the transmitting device provides a reference clock source
  • the clock module on the receiving device provides an adjustable VCXO clock source for tracking a reference clock.
  • a clock signal of the clock module on the transmitting device and a clock signal of the clock module on the receiving device are determined to be synchronized when the transceiving rates of the clock module on the transmitting device and the clock module on the receiving device are consistent, and when also taken consideration of the status information fed back by the FIFO buffer.
  • the present utility model further provides an electronic device, comprising a circuit board having the UWB-based low-delay lossless digital audio transmission unit.
  • the process that the digital audio transmission unit receives a data signal is as follows: The antenna array receives the second digital audio signal sent to the UWB processing module by the another digital audio transmission unit; the UWB processing module receives valid data conforming to the UWB specification; the received valid data are written into a data cache, transmitted to the FIFO buffer through the real-time transport protocol stack, and unpacked through the I2S data processing module; after the clock module synchronizes the clock, the unpacked data are output from the I2S interface to the audio processing module for processing according to an audio sampling rate and bit depth in a data packet, where a digital signal is converted into an electric signal; the electric signal is transmitted to the outside through the loudspeaker in a manner of an acoustic signal.
  • the process that the digital audio transmission unit sends a data signal is as follows:
  • the audio input module inputs an audio signal, converts the audio signal into a first digital audio signal in I2S format, and outputs the first digital audio signal to the audio processing module;
  • the audio processing module processes the received first digital audio signal and inputs the first digital audio signal to the I2S data processing module through the I2S interface;
  • the data processing module packs the received data, and the packed data includes audio data, sampling rate, bit depth, serial numbers of channels etc;
  • the packed data are transmitted to the FIFO buffer for buffering and then transmitted to the UWB processing module through the real-time transport protocol stack;
  • the UWB processing module buffers the received data, conducts baseband radio frequency processing, modulates a wireless signal according to the UWB specification, and conducts radio frequency output through the antenna array.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Communication Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Stereophonic System (AREA)
US17/882,594 2022-06-20 2022-08-07 UWB-based low-delay lossless digital audio Active 2043-01-13 US12010489B2 (en)

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CN202221533222.6 2022-06-20
CN202221533222.6U CN217522832U (zh) 2022-06-20 2022-06-20 一种基于uwb的低延迟无损数字音频传输单元、系统及电子设备

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US12010489B2 true US12010489B2 (en) 2024-06-11

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EP (1) EP4297283A1 (de)
JP (1) JP3240056U (de)
CN (1) CN217522832U (de)
AU (1) AU2022224718A1 (de)
CA (1) CA3171646A1 (de)
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CN117951058B (zh) * 2024-01-19 2024-06-25 长沙驰芯半导体科技有限公司 一种用于超宽带的子系统控制接口自适应方法及装置

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US20080171561A1 (en) * 2007-01-11 2008-07-17 Texas Instruments Incorporated Apparatus for and method of radio link establishment between two communication devices
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CN112312369B (zh) * 2020-09-29 2023-10-27 无锡中感微电子股份有限公司 一种低延迟无线音频发送和接收方法及设备
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US5361070A (en) * 1993-04-12 1994-11-01 Regents Of The University Of California Ultra-wideband radar motion sensor
US5361070B1 (en) * 1993-04-12 2000-05-16 Univ California Ultra-wideband radar motion sensor
US20080171561A1 (en) * 2007-01-11 2008-07-17 Texas Instruments Incorporated Apparatus for and method of radio link establishment between two communication devices
US20200233397A1 (en) * 2019-01-23 2020-07-23 New York University System, method and computer-accessible medium for machine condition monitoring
US20210377657A1 (en) * 2019-02-11 2021-12-02 Koko Home, Inc. System and method for processing multi-directional signals and feedback to a user to improve sleep
US20210066799A1 (en) * 2019-08-27 2021-03-04 Apple Inc. Electronic Devices Having Enclosure-Coupled Multi-Band Antenna Structures
US11240635B1 (en) * 2020-04-03 2022-02-01 Koko Home, Inc. System and method for processing using multi-core processors, signals, and AI processors from multiple sources to create a spatial map of selected region

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TWM638810U (zh) 2023-03-21
CN217522832U (zh) 2022-09-30
WO2023245737A1 (zh) 2023-12-28
CA3171646A1 (en) 2023-12-20
AU2022224718A1 (en) 2024-01-18
EP4297283A1 (de) 2023-12-27
US20230412975A1 (en) 2023-12-21
JP3240056U (ja) 2022-12-05

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